SPSS® 12.0 Command Syntax Reference

Example
* Contrasts for a logistic regression model
LOGLINEAR 825
LOGLINEAR RESPONSE(1,2) BY TIME(1,4)
/CONTRAST(TIME) = SPECIAL(4*1, 7 14 27 51, 8*1)
/PRINT=ALL /PLOT=DEFAULT
/DESIGN=RESPONSE, TIME(1) BY RESPONSE.
• CONTRAST is used to transform the independent variable into a metric variable.
• TIME represents elapsed time in days. Therefore, the weights in the contrast represent the
metric of the passage of time.
CRITERIA Subcommand
CRITERIA specifies the values of some constants in the Newton-Raphson algorithm. Defaults
or specifications remain in effect until overridden with another CRITERIA subcommand.
CONVERGE(n) Convergence criterion. Specify a value for the convergence criterion. The
default is 0.001.
ITERATE(n) Maximum number of iterations. Specify the maximum number of iterations
for the algorithm. The default number is 20.
DELTA(n) Cell delta value. The value of delta is added to each cell frequency for the
first iteration. For saturated models, it remains in the cell. The default value
is 0.5. LOGLINEAR does not display parameter estimates or correlation matrices
of parameter estimates if any sampling zero cells exist in the expected
table after delta is added. Parameter estimates and correlation matrices can
be displayed in the presence of structural zeros.
DEFAULT Default values are used. DEFAULT can be used to reset the parameters to the
default.
Example
LOGLINEAR DPREF(2,3) BY RACE ORIGIN CAMP(1,2)
/CRITERIA=ITERATION(50) CONVERGE(.0001).
• ITERATION increases the maximum number of iterations to 50.
• CONVERGE lowers the convergence criterion to 0.0001.
PRINT Subcommand
PRINT requests statistics that are not produced by default.
• By default, LOGLINEAR displays the frequency table and residuals. The parameter estimates
of the model are also displayed if DESIGN is not used.
• Multiple PRINT subcommands are permitted. The specifications are cumulative.